211117122 has 24 divisors (see below), whose sum is σ = 458042364. Its totient is φ = 70276704.

The previous prime is 211117061. The next prime is 211117139. The reversal of 211117122 is 221711112.

It can be written as a sum of positive squares in 2 ways, for example, as 211091841 + 25281 = 14529^2 + 159^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211117095 and 211117104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6328 + ... + 21500.

Almost surely, 2^211117122 is an apocalyptic number.

211117122 is an abundant number, since it is smaller than the sum of its proper divisors (246925242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211117122 is a wasteful number, since it uses less digits than its factorization.

211117122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15954 (or 15951 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 211117122 is about 14529.8699925361. The cubic root of 211117122 is about 595.4443137509. Note that the first 3 decimals are identical.

Adding to 211117122 its reverse (221711112), we get a palindrome (432828234).

The spelling of 211117122 in words is "two hundred eleven million, one hundred seventeen thousand, one hundred twenty-two".